upstream/ipython Files · IPython/utils/zmqrelated.py

Prevent qtconsole frontend freeze on lots of output....

Prevent qtconsole frontend freeze on lots of output. The output from the kernel is now clipped to last `buffer_size` before displaying and a timer is used to flush the pending output text instead of attempting to display text on every stream output from kernel. The timer interval is adjusted based on actual time taken to append a screenful of text to widget. This throttles the widget repaints and avoids choking the Qt event loop leaving time to handle other Qt events. Test cases: In [1]: for i in xrange(1000000): print i In [2]: range(100000) Without this commit the first input causes the qtconsole frontend to freeze, not responding to `Ctrl+C`.

Thomas Kluyver - - Load All Authors

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             zmqrelated.py
        
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      """utilities for checking zmq versions"""

      #-----------------------------------------------------------------------------

      #  Copyright (C) 2013  The IPython Development Team

      #

      #  Distributed under the terms of the BSD License.  The full license is in

      #  the file COPYING.txt, distributed as part of this software.

      #-----------------------------------------------------------------------------

      #-----------------------------------------------------------------------------

      # Verify zmq version dependency >= 2.1.11

      #-----------------------------------------------------------------------------

      from IPython.utils.version import check_version

      def patch_pyzmq():

          """backport a few patches from newer pyzmq

          These can be removed as we bump our minimum pyzmq version

          """

          import zmq

          # fallback on stdlib json if jsonlib is selected, because jsonlib breaks things.

          # jsonlib support is removed from pyzmq >= 2.2.0

          from zmq.utils import jsonapi

          if jsonapi.jsonmod.__name__ == 'jsonlib':

              import json

              jsonapi.jsonmod = json

      def check_for_zmq(minimum_version, required_by='Someone'):

          try:

              import zmq

          except ImportError:

              raise ImportError("%s requires pyzmq >= %s"%(required_by, minimum_version))

          patch_pyzmq()

          pyzmq_version = zmq.__version__

          if not check_version(pyzmq_version, minimum_version):

              raise ImportError("%s requires pyzmq >= %s, but you have %s"%(

                              required_by, minimum_version, pyzmq_version))

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				"""utilities for checking zmq versions"""
				#-----------------------------------------------------------------------------
				# Copyright (C) 2013 The IPython Development Team
				#
				# Distributed under the terms of the BSD License. The full license is in
				# the file COPYING.txt, distributed as part of this software.
				#-----------------------------------------------------------------------------

				#-----------------------------------------------------------------------------
				# Verify zmq version dependency >= 2.1.11
				#-----------------------------------------------------------------------------

				from IPython.utils.version import check_version


				def patch_pyzmq():
				"""backport a few patches from newer pyzmq

				These can be removed as we bump our minimum pyzmq version
				"""

				import zmq

				# fallback on stdlib json if jsonlib is selected, because jsonlib breaks things.
				# jsonlib support is removed from pyzmq >= 2.2.0

				from zmq.utils import jsonapi
				if jsonapi.jsonmod.__name__ == 'jsonlib':
				import json
				jsonapi.jsonmod = json


				def check_for_zmq(minimum_version, required_by='Someone'):
				try:
				import zmq
				except ImportError:
				raise ImportError("%s requires pyzmq >= %s"%(required_by, minimum_version))

				patch_pyzmq()

				pyzmq_version = zmq.__version__

				if not check_version(pyzmq_version, minimum_version):
				raise ImportError("%s requires pyzmq >= %s, but you have %s"%(
				required_by, minimum_version, pyzmq_version))